131242543644 has 24 divisors (see below), whose sum is σ = 307085627520. Its totient is φ = 43625653744.

The previous prime is 131242543633. The next prime is 131242543651. The reversal of 131242543644 is 446345242131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15228114 + ... + 15236729.

It is an arithmetic number, because the mean of its divisors is an integer number (12795234480).

Almost surely, 2^131242543644 is an apocalyptic number.

It is an amenable number.

131242543644 is an abundant number, since it is smaller than the sum of its proper divisors (175843083876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131242543644 is a wasteful number, since it uses less digits than its factorization.

131242543644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30465209 (or 30465207 counting only the distinct ones).

The product of its digits is 276480, while the sum is 39.

Adding to 131242543644 its reverse (446345242131), we get a palindrome (577587785775).

The spelling of 131242543644 in words is "one hundred thirty-one billion, two hundred forty-two million, five hundred forty-three thousand, six hundred forty-four".